Both my wife and I worked at the Park City Mall, and were just coming home from work on a warm, humid summer night. We lived in an apartment complex on Route 30 east called Greenland Village.

As we came into the complex parking lot to pull into our space, we saw all of our neighbors out, about a dozen, pointing up to the sky.
What we all saw was an extremely large (probably the size of a house) object, which I would like to say was somewhat triangular shaped, but could not be sure, for the very simple reason that what, in essence we were looking at (and mind you it was a perfectly clear, starry night) appeared to be "cloaked"......that is, for those of you who are Star Trek fans,  you may remember that when the Klingons would cloak their vessels, you would somewhat see the shape, but, what you were actually looking at was the appearance of something that you could to some degree make out the shape of, yet, you could see through it, and it"wavered", in much the same way that you get a distortion of shape when you see heat rising from hot macadem in the summertime.......there was a shadowy appearance to the edges, which, even in liew of the fact that you could see through this "wavering shape", the shadows along the edges helped to define it........you could also faintly make out the appearance of lights on long stalks.....many of them.......but again, somewhat cloaked.....
The vehicle was absolutely enormous.......it was completely silent, and, much like in the movies, it was dead silent all around, as we watched the vehicle move away silently.......
As soon as it was gone, you could then hear the crickets, etc......again, forgive the analogy, but, very much like in the movies....
It did not so much "climb" and dissappear, but, rather, it more or less traveled away from us and eventually we could not see it
Date may be approximate, although the witness does not indicate that fact.  PD